CN212084115U - Improved curved surface touch screen - Google Patents

Abstract

The utility model discloses a modified curved surface touch-sensitive screen, include glass apron, SCA optical cement layer that sets gradually from the extroversion in and bind the function piece that has integrated circuit flexible circuit board, the outside or the inboard of glass apron are provided with compound resin plate, and compound resin plate thickness is 1mm ~ 4mm, and compound resin plate's luminousness is more than or equal to 95%; the functional sheet is adhered to the inner side surface of the glass cover plate or the inner side surface of the composite resin plate through the SCA optical adhesive layer. Compared with the prior art, the curved surface touch screen improves the structural rigidity, realizes the production of the curved surface touch screen with the oversized size, and can be applied to the special fields of industrial control, household appliances, medical treatment, military industry and the like.

Description

Improved curved surface touch screen

Technical Field

The utility model belongs to the technical field of the touch-sensitive screen technique and specifically relates to a modified curved surface touch-sensitive screen is related to.

Background

With the mass popularization of smart phones and tablet computers in the market, the capacitive touch screen serving as a human-computer exchange interface is increasingly widely applied. G + G capacitive touch screens, namely touch screens made of surface tempered GLASS and GLASS GLASS materials, are commonly adopted for large-size touch screens.

The G + G capacitive touch screen in the prior art is low in structural reliability, limited in production size and difficult to produce an oversized curved surface touch screen.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a modified curved surface touch-sensitive screen can improve G + G capacitive touch screen's structural rigidity, makes curved surface touch-sensitive screen's production size reach 72 cun.

In order to achieve the above object, the utility model adopts a technical scheme that the improved curved touch screen comprises a glass cover plate, an SCA optical adhesive layer and a functional sheet bound with an integrated circuit flexible circuit board, wherein the glass cover plate, the SCA optical adhesive layer and the functional sheet are sequentially arranged from outside to inside, a composite resin plate is arranged on the outer side or the inner side of the glass cover plate, the thickness of the composite resin plate is 1 mm-4 mm, and the light transmittance of the composite resin plate is greater than or equal to 95%; the functional sheet is adhered to the inner side surface of the glass cover plate or the inner side surface of the composite resin plate through the SCA optical adhesive layer.

In a further technical scheme, the composite resin plate is attached to the outer side surface of the glass cover plate, a reinforcing plate optical adhesive layer is arranged between the composite resin plate and the glass cover plate, and the reinforcing plate optical adhesive layer comprises SCA optical adhesive or OCA optical adhesive; the functional sheet is attached to the inner side surface of the glass cover plate.

In a further technical scheme, the composite resin plate comprises a first polymethyl methacrylate layer, a polycarbonate layer and a second polymethyl methacrylate layer, wherein the thickness ratio of the first polymethyl methacrylate layer to the polycarbonate layer to the second polymethyl methacrylate layer is 2: 8: 1.

in a further technical scheme, the functional sheet comprises an ITO Film conductive Film.

In a further technical scheme, the functional sheet comprises ITO Glass conductive Glass.

In a further technical scheme, the functional sheet comprises a graphene film.

In a further technical scheme, the functional sheet comprises a nano silver film.

The utility model also provides an electronic display device, which comprises a glass cover plate, an SCA optical adhesive layer and a functional sheet bound with an integrated circuit flexible circuit board which are arranged from outside to inside in sequence; the outer side or the inner side of the glass cover plate is provided with a composite resin plate, the composite resin plate is made of transparent wood materials, the thickness of the composite resin plate is 3-7 mm, and the light transmittance of the composite resin plate is larger than or equal to 90%; the functional sheet is adhered to the inner side surface of the glass cover plate or the inner side surface of the composite resin plate through the SCA optical adhesive layer.

After the structure is adopted, compared with the prior art, the utility model the advantage that has is: the glass cover plate of the touch screen provided by the utility model is provided with the composite resin plate, and simultaneously adopts the material hierarchical structure of the optical adhesive layer, the functional sheet and the integrated circuit flexible circuit board, so that the cover plate thickness can reach 3 mm-7 mm, has the advantages of strong waterproof capability and high structural rigidity, and can be widely applied to the special fields of industrial control, household appliances, medical treatment, military industry and the like; the rigidity limit of the curved touch screen is broken through, and the production size of the curved touch screen reaches 72 inches.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby.

An improved curved touch screen is shown in figure 1 and comprises a glass cover plate 1, an SCA optical adhesive layer 2 and a functional sheet 3 bound with an integrated circuit flexible circuit board, wherein the glass cover plate 1, the SCA optical adhesive layer 2 and the functional sheet are sequentially arranged from outside to inside; the thickness of the composite resin plate 5 is 1 mm-4 mm, and the light transmittance of the composite resin plate is greater than or equal to 95%; the functional sheet 3 is adhered to the inner side surface of the glass cover plate 1 or the inner side surface of the composite resin plate 5 through the SCA optical adhesive layer 2.

Specifically, the composite resin plate 5 is attached to the outer side surface of the glass cover plate 1, a reinforcing plate optical adhesive layer 4 is arranged between the composite resin plate 5 and the glass cover plate 1, and the reinforcing plate optical adhesive layer 4 comprises SCA optical adhesive; the functional sheet 3 is attached to the inner side surface of the glass cover plate 1.

Specifically, the composite resin plate comprises a first polymethyl methacrylate layer, a polycarbonate layer and a second polymethyl methacrylate layer, wherein the thickness ratio of the first polymethyl methacrylate layer to the polycarbonate layer to the second polymethyl methacrylate layer is 2: 8: 1. the composite resin plate has excellent optical performance, high surface hardness, high bending strength, small warping degree, good impact resistance and high safety, and can be subjected to various surface treatments without being pasted with an explosion-proof film.

The optical adhesive layer 4 of the reinforcing plate can be OCA optical adhesive, is colorless and transparent, has the light transmittance of more than 90 percent, has good bonding strength, can be cured at room temperature or intermediate temperature, and has the characteristics of small curing shrinkage and the like. The OCA optical cement is one of the raw materials of the important touch screen. The optical acrylic adhesive is made into a double-sided adhesive tape without a base material, and then a layer of release film is respectively adhered to an upper bottom layer and a lower bottom layer.

The optical Adhesive layer 4 of the reinforcing plate can also be OCA optical Adhesive, and SCA optical Adhesive (Solid optical Clear Adhesive) is optical transparent Adhesive, and the main component of the optical transparent Adhesive is acrylic resin. The touch screen has excellent light transmittance, definition and adhesion, excellent moisture resistance, heat resistance and weather resistance, particularly excellent shock resistance and explosion resistance, and greatly improves the overall safety, reliability, durability and attractiveness of the touch screen. The SCA optical cement is particularly suitable for the laminating field with the thickness of 5 composite resin plates, and can provide perfect visual effect for the display of a touch screen.

The functional sheet 3 is a Sensor, is an electrical signal functional layer of the capacitive screen, can be made of a single-layer material, and can also be a composite mechanism formed by multiple layers of materials, and is commonly called as a 'functional layer'. The functional sheet 3 is any one of an ITO Film conductive Film, ITO Glass conductive Glass, graphene or nano silver, and a conductive Film material and conductive Glass which can achieve the same performance can be adopted as the functional sheet 3.

The main parameters of an ITO (Indium-Tin Oxide) Film conductive Film are: surface resistance, uniformity of surface resistance, light transmittance, thermal stability, heat shrinkage, heat curl, and the like. Wherein the light transmittance is mainly related to the base material used for the ITO film and the surface resistance of the ITO film. Under the condition that the substrate materials are the same, the smaller the surface resistance of the ITO film is, the larger the thickness of the ITO film layer is, and the light transmittance is correspondingly reduced to a certain degree.

ITO Glass conductive Glass, namely Indium Tin Oxide (Indium-Tin Oxide) transparent functional sheet 3 Glass, is a high-tech product obtained by sputtering an Indium Tin Oxide conductive film coating on ultrathin Glass and performing high-temperature annealing treatment in a highly purified factory environment by using a planar magnetron technology through an ITO functional sheet 3 Glass production line in many ways. It is widely used in Liquid Crystal Displays (LCDs), solar cells, microelectronic ITO functional sheet 3 glass, optoelectronics, and various optical fields.

With the progress of science and technology and the market pressure of ITO raw materials, more and more new materials are developed to replace ITO to make ITO films and ITO glass with the same performance. The transparent conductive material used to replace ITO consists of the following: metal Mesh of Metal Mesh; a conductive polymer; nano silver; graphene.

The integrated circuit flexible circuit board 4 comprises a touch screen FPC and a touch IC, wherein the touch IC is arranged on the touch screen FPC to form a COF structure, or is arranged on the mainboard to form a COB structure.

The COF (Chip on Film Chinese is a crystal grain soft Film packaging technology) has a structure similar to a single-layer FPC (flexible printed circuit), has the characteristics of light weight, high resolution, good flexibility, high Chip packaging density, support for repair and the like, is more suitable for the development requirements of small volume of electronic components, thickened cover plate thickness and high interconnection density, and is an important high-density packaging technology in the future. After the touch IC is fixed on the touch screen FPC to form a COF structure, the thickness and flexibility of the COF structure are far superior to those of the FPC (Flexible Printed Circuit).

COB (chip-on-board chip on board) directly packages the touch IC on the main board, and then packages and cures the touch IC by epoxy resin glue, so that the touch panel has the excellent characteristics of ultra-light weight, anti-collision and anti-pressure property, large visual angle, flexibility and the like.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (8)

1. The utility model provides a modified curved surface touch-sensitive screen, includes glass apron, SCA optical cement layer that sets gradually from the extroversion inwards and binds the function piece that has integrated circuit flexible circuit board, its characterized in that: the outer side or the inner side of the glass cover plate is provided with a composite resin plate, the thickness of the composite resin plate is 1-4 mm, and the light transmittance of the composite resin plate is greater than or equal to 95%;

the functional sheet is adhered to the inner side surface of the glass cover plate or the inner side surface of the composite resin plate through the SCA optical adhesive layer.

2. An improved curved touch screen as defined in claim 1, wherein: the composite resin plate is attached to the outer side face of the glass cover plate, a reinforcing plate optical adhesive layer is arranged between the composite resin plate and the glass cover plate, and the reinforcing plate optical adhesive layer comprises SCA optical adhesive or OCA optical adhesive;

the functional sheet is attached to the inner side surface of the glass cover plate.

3. An improved curved touch screen as defined in claim 2, wherein: the composite resin plate comprises a first polymethyl methacrylate layer, a polycarbonate layer and a second polymethyl methacrylate layer, wherein the thickness ratio of the first polymethyl methacrylate layer to the polycarbonate layer to the second polymethyl methacrylate layer is 2: 8: 1.

4. an improved curved touch screen as claimed in any one of claims 1 to 3, wherein: the functional sheet comprises an ITO Film conductive Film.

5. An improved curved touch screen as claimed in any one of claims 1 to 3, wherein: the functional sheet comprises ITO Glass conductive Glass.

6. An improved curved touch screen as claimed in any one of claims 1 to 3, wherein: the functional sheet comprises a graphene film.

7. An improved curved touch screen as claimed in any one of claims 1 to 3, wherein: the functional sheet comprises a nano silver film.

8. An electronic display device, characterized by: the composite resin plate is arranged on the outer side or the inner side of the glass cover plate, the thickness of the composite resin plate is 1-4 mm, and the light transmittance of the composite resin plate is greater than or equal to 95%; the functional sheet is adhered to the inner side surface of the glass cover plate or the inner side surface of the composite resin plate through the SCA optical adhesive layer.

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